<template>
    <div>
        <div class="search">
            <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
        </div>
        <div class="search-content" ref="search" v-show="keyword">
            <ul>
                <li class="search-item"
                     v-for="item of list"
                     :key="item.id"
                      @click="handleCityClick(item.name)"
                >
                    {{item.name}}
                </li>
                <li class="search-item border-bottom" v-show="hasNoData">
                    没有找到匹配数据
                </li>
            </ul>
        </div>
    </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default{
    name: 'CitySearch',
    props: {
        cities: Object
    },
    data(){
        return {
            keyword: '',
            list: [],
            timer: null
        }
    },
    computed: {
        hasNoData(){
            return !this.list.length
        }
    },
    watch: {
        keyword () {
            if(this.timer){
                clearTimeout(this.timer)
            }
            if(!this.keyword){
                this.list=[]
                return
            }
            this.timer = setTimeout(()=>{
                const result =[]
                for(let i in this.cities){
                    this.cities[i].forEach((value)=>{
                        if(value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1){
                            result.push(value)
                        }
                    })
                }
                this.list =result
            })
        }
    },
    methods:{
        handleCityClick (city) {
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
    },
    mounted (){
        this.scroll = new Bscroll(this.$refs.search)
    }
}
</script>
<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .search
    height: .72rem
    padding: 0 .1rem
    background: $bgColor
    .search-input
      box-sizing: border-box
      width: 100%
      height: .62rem
      padding: 0 .1rem
      line-height: .62rem
      text-align: center
      border-radius: .06rem
      color: #666
  .search-content
    z-index: 1
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    background: #eee
    .search-item
      line-height: .62rem
      padding-left: .2rem
      background: #fff
      color: #666
</style>
